JPH0471544B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operating room lamp whose members are connected through joints, and more particularly to an operating room lamp whose members are connected via joints, and in particular, at least one handle allows an operator to move the lamp about at least one axis and/or Alternatively, the present invention relates to an operating room lamp that can be moved to a desired position along an elongated sliding track.

The operating room lamps are generally attached to the ceiling of the operating room or to a suitable frame via linkages that are pivotable about multiple axes. As a result, the operating room lamp can be moved to a plurality of desired positions by the operator, and can ideally illuminate the surgical site on the operating table.

While adjusting a surgical lamp, all bearings must move somewhat smoothly, so the position of the lamp body that should not move as much as possible should be adjusted until the adjustment of the lamp body is complete. should be considered after the Moreover, the position of the lamp body must never change even if, for example, the lamp body or the link mechanism that supports it is struck. In known operating room lamps, all bearings are provided with a certain degree of rigidity in order to achieve a suitable compromise between the smoothness of movement required during adjustment and the required fixity after adjustment. There is.

The purpose of the present invention is to select a position that cannot be easily changed before and after adjusting the lamp body, and at the same time, it is possible to smoothly move and adjust the lamp body without any conscious operation by the operator. An object of the present invention is to provide a lamp for an operating room.

In order to achieve the above and other objects, the present invention provides a surgical instrument supported on a movable member displaceable with respect to at least one operating handle and at least one pivot axis and/or sliding axis. In the lamp, an electromagnetic brake is attached to the movable member, and the brake is maintained in a braking state to prevent movement of the movable member in a normal state, thereby preventing movement of the movable member. The electromagnetic brake is configured such that the handle has a built-in release switch means for the electromagnetic brake, and when the handle is grasped by an operator, the release switch operates to a braking position, and the movable member is restrained by the electromagnetic brake. A surgical lamp device is provided that is configured to release the force.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 3.

As shown in FIG.
is rotatably mounted on a vertical central support shaft 11 at an angle of 90°. A central support shaft 11 is attached to the ceiling of the stage. Horizontal boom 12 is attached to central support shaft 11 via bearings 28 and rotates about the central axis of central support shaft 11 . Therefore, the total turning radius of the lamp body 16 is determined by the length of the horizontal boom 12. The downwardly extending vertical tube 13 connects to the horizontal boom 12 via another bearing 28 so that it can pivot about one vertical axis.
attached to the outer edge of the A spring mechanism (not shown) is built into the vertical tube 13 and acts on a spring hinge 29 disposed at the lower end of the vertical tube 13. A short, generally horizontal support rod 14 is pivotally mounted on a spring hinge 29 for pivoting about a horizontal axis.

Support fork 1 that supports the lamp body 16
5 is the support rod 14 separate from the spring hinge 29
is rotatably attached to the tip of the shaft via a bearing 28. The rotational axis of the bearing 28 and the central axis of the support rod 14 are coaxial. Support fork 15
Bearings 28 provided at both ends of the lamp body 1
6 is supported so as to be pivotable about one horizontal axis. This horizontal axis is perpendicular to the pivot axis of the bearing 28 provided at the tip of the support rod 14. The lamp body 16 includes one or more light sources, a filter glass, a focusing mechanism, and a cover made of safety glass, and has a considerable weight. Therefore, relatively large forces are exerted on the central support shaft 11, the horizontal boom 12 and the vertical tube 1.
It acts on 3. These forces are applied to the central support shaft 11, the horizontal boom 12 and the vertical tube 1.
Through bending of 3, displacements about the vertical and horizontal axes can occur. For the purpose of effective illumination of the surgical position, bearings 28 disposed at both ends of the horizontal boom 12 prevent the lamp body 16 from moving away from the selected position. Even when the lamp body 16 is extended, the brake 18 must be applied so that the lamp body 16 does not move unexpectedly due to the torque applied to the bearing 28. Since absolute compensation of the spring characteristics in the spring compensation mechanism integrated in the vertical tube 13 and thus achieving a constant spring pressure in the spring hinge 29 can only be achieved at high costs, other The brake 18 must also act on the bearing 28 and the spring hinge 29. The spring compensation mechanism built into the vertical tube 13 must exert a force that balances the weight of the lamp body 16, support rod 14 and support fork 15.

For example, when lifting a microphone for indicating tools during surgery, it is necessary to prevent the lamp body 16 from tilting about the axis of the bearing 28 disposed on the support fork 15.

The operation of the lamp body 16 is performed using the supporting fork 1.
This is done using either the handlebar 19 disposed opposite the lamp body 5 or the sterilizable handle 20 disposed at the center of the lower surface of the lamp body 16.

According to the invention, the brakes 18 include relatively movable brakes 11, 12, 13,
Joint 1 arranged between 14, 15 and 16
It is set at 7. The basic structure of the brake 18 is shown in FIG. As shown in FIG. 2, a braking surface 30 is provided, for example, on the end face of the central support shaft 11 and cooperates with a pad-shaped brake shoe 31. This brake shoe 31 is movable relative to the braking surface 30 and is arranged on the horizontal boom 12 . The brake shoe 31 is normally pressed against the brake surface 30 by a spring 23, so that the central support shaft 11 and the horizontal boom 12 are either very difficult to move relative to each other or unable to move at all. An electromagnet 22 is arranged below the brake shoe 31 at a certain distance. Electromagnet 22 is energized by closing switch 25. Electromagnet 22
When excited, the brake shoe 31, which is made of a suitable magnetic material, is attracted and the brake shoe 31 is separated from the brake surface 30. Therefore, after detachment, the central support shaft 11
and the horizontal boom 12 are connected only by a bearing 28. This bearing 28 facilitates mutual movement of the central support shaft 11 and the horizontal boom 12.
Moreover, it is configured so that it can be easily rotated.

When the switch 25 is opened again, the brake shoe 31 is pressed against the brake surface 30 by the spring 23. The central support shaft 11 and the horizontal boom 12 are thus once again fixed to each other.

Similar brakes 18 are also provided at other joints 17.

The operation of the electromagnet 22, which is a kind of release mechanism and is provided in the brake 18 in the joint 17, will be explained in detail with reference to FIGS. 1 and 3.

Electronic components 32 are incorporated into the operating room lamp. This electronic component 32 includes a power supply 27, a control circuit 2
4, an amplifier 26 and a switch 25.

The sensor 21 is housed within the handlebar 19 or sterilizable handle 20, and a lead extending from the sensor 21 is connected to an input terminal of a control circuit 24. The output of the electronic component 32 supplies an exciting current to the electromagnets 22 provided in all the joints 17 when the switch 25 is closed. Electronic parts 3
2. The various electrical connection lines between handlebar 19, handle 20 and electromagnet 22 are shown in dashed lines in FIG.

The metal sensors 21 housed in the handlebar 19 or sterilizable handle 20 are electrically insulated from all earthed parts so that these sensors 21 have a constant capacitance to earth. has been done. Therefore, when the operator grips the handlebar 19 or handle 20, the capacitance of the sensor 21 increases with respect to ground potential. This is because it is inevitable that everyone has a certain amount of capacitance with respect to ground potential.
In this way, the total capacitance of the sensor 21 to ground potential increases when a person touches this sensor 21.

Control circuit 24 of FIG. 3 writes a capacitance increase of the type described above and forwards the signal to amplifier 26. Control circuit 24 of FIG. This signal closes the switch 25. As a result, an exciting current flows from the power source 27 to all the electromagnets 22 in the joint 17. As a result, all brake shoes 31 (see Figure 2)
is released from the brake surface 30 that it was in contact with.
A brake such as that shown in FIG.
Since all the electromagnets 22 are connected in parallel, they are energized together when the switch 25 is closed.

As described above, all brakes 18 are
Only when a person is in contact with the handlebar 19 or handle 20 is there a release between mutually rotatable structural parts in all joints 17. Therefore, when changing the position and posture of the lamp body 16, this change can be made very easily.

By removing a part of the human body from the handlebar 19 or the handle 20, the capacitance of the sensor 21 with respect to ground decreases again, and this decrease is reflected in the control circuit 24 in the same manner as in the case of increase. written. At this point, the transfer of the signal to amplifier 26 is stopped so that switch 25 is opened. Therefore, the excitation current of all the electromagnets 22 is cut off, and the spring 23 is again activated by the brake shoe 31.
is pushed back towards the brake surface 30 and brought into contact with this brake surface 30. The central support shaft 11, the horizontal boom 12, the vertical tube 13, the support rod 14, the support fork 15 and the lamp body 16, which are connected to each other via bearings 28, are again fixed to each other, all as described above. be done.

Preferably, the handle 20 is removable so that it can be sterilized or replaced prior to a new surgery.

The above handlebar 19 and sterilizable handle 20
are preferably coated with an insulating layer which acts as a dielectric so that these parts are not referred to as "accessible metal parts" which must be earthed according to safety regulations.

An important advantage of the operating room lamp according to the invention is that when the electromagnet is inactive, it is not energized, ie there is also no load on the power supply. In other words, the effect is that power consumption occurs only during the period necessary to move the lamp body.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an operating room lamp having a support link mechanism according to the present invention, and FIG. 2 is a brake used in the operating room lamp, which includes:
FIG. 3, a schematic cross-sectional view of the release mechanism configured as an electromagnet, is a block circuit diagram of the electrical control device for the operating room lamp. 11... Central support shaft, 12... Horizontal boom, 13... Vertical tube, 14... Support rod, 15... Support fork, 16... Lamp body, 17... Joint, 18... Brake, 19...
Handlebar, 20...Handle, 21...Sensor, 2
2... Electromagnet, 23... Spring, 24... Electric control circuit, 28... Bearing.

Claims (1)

[Claims] 1 A surgical lamp supported by at least one operating handle and at least one movable member displaceable with respect to a rotational axis and/or a sliding axis, the movable member being provided with an electromagnetic brake. , the brake is configured to be held in a braking state to prevent movement of the movable member in a normal state, and to prevent movement of the movable member, and the handle includes a release switch means for the electromagnetic brake. and a surgical lamp configured such that when an operator grips the handle, the release switch is moved to a braking position to release the restraining force on the movable member by the electromagnetic brake. Device.